condition	mean	min	max
4 h after light	8.665986666666667	8.43065	9.05003
8 h after light	8.75156	8.47919	9.25422
12 h after light	8.49916	8.357619999999999	8.68244
4 h after dark	8.345973333333333	7.8921399999999995	8.67858
8 h after dark	8.45206	8.21875	8.79981
12 h after dark	8.265876666666667	7.99443	8.67078